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How to Stir Paint Properly

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Whether you’re painting a garden fence, coating a warehouse floor or applying a high-performance industrial coating, one simple step can make the difference between a professional finish and a costly failure: stirring the paint properly.

Many people assume that a new tin of paint is ready to use straight away. In reality, pigments, fillers and other ingredients naturally settle during storage and transport. If these components aren’t thoroughly mixed back together, the paint may not perform as the manufacturer intended.

In the video below, our technical team demonstrates the correct way to stir paint before application. Read on to learn why this process is so important, common mistakes to avoid and how to mix different types of coatings correctly.

Why is it important to stir paint?

Paint is made up of several components, including pigments, binders, resins, solvents and additives. Over time, the heavier ingredients naturally sink to the bottom of the tin.

If you don’t stir the paint thoroughly, the first part you pour may contain too much solvent and not enough pigment, while the remaining paint becomes increasingly thick and heavily pigmented.

Proper stirring helps to:

  • Ensure an even colour throughout the tin
  • Maintain a consistent gloss or sheen level
  • Improve adhesion to the substrate
  • Achieve the correct film thickness
  • Prevent patchy or streaky finishes
  • Ensure specialist coatings perform as designed

This is especially important for industrial coatings, floor paints, primers and specialist protective coatings, where performance is just as important as appearance.

What happens if you don’t stir paint?

Failing to mix paint correctly can lead to several common problems, including:

Uneven colour. Pigments settle at the bottom of the tin. Without proper mixing, the colour may vary across the surface.

Inconsistent finish. Matt paints may dry with shiny patches, while gloss paints can lose their uniform appearance.

Poor adhesion. Some of the ingredients responsible for bonding the coating to the surface may not be evenly distributed.

Reduced durability. Protective coatings rely on precise formulations. Poor mixing can reduce resistance to weather, chemicals and abrasion.

Longer drying times. An incorrectly mixed coating may dry unevenly or fail to cure as expected.

In many cases, customers believe there’s a problem with the paint when the real issue is simply that it wasn’t mixed thoroughly before application.

How to stir single-pack paint correctly

For most decorative and industrial single-pack paints, follow these simple steps:

 1. Open the tin carefully. Remove the lid without damaging the rim, as this helps ensure a good seal if the paint is stored afterwards.

2. Check for settlement. Look inside the tin. It’s perfectly normal to see thicker material at the bottom after storage.

3. Scrape the bottom. Using a paint stirrer or mixing paddle, scrape firmly along the base and into the edges of the tin where settled pigments collect.

4. Stir thoroughly. Mix steadily until the paint reaches a completely smooth and uniform consistency. For larger tins, a drill-mounted paddle mixer will usually provide a better result than hand stirring.

5. Stir again during use. If you’re painting for an extended period, stir the paint every 15-20 minutes to keep pigments evenly suspended.

How to mix two-pack epoxy paints

Two-pack coatings require even greater care. Before combining the components:

  • Stir the base thoroughly on its own.
  • Stir the hardener if recommended by the manufacturer.
  • Combine both parts using the correct mixing ratio.
  • Mix mechanically for the recommended time.
  • Scrape the sides and bottom of the container during mixing.
  • Allow any induction time if specified on the product data sheet.

Never guess the mixing ratio or alter the proportions. Incorrectly mixed two-pack coatings may fail to cure properly and often cannot be repaired without removing the coating completely.

The best tools for stirring paint

The right tool depends on the size of the container and the type of coating.

Wooden stir stick. Ideal for small tins of decorative paint and wood finishes.

Plastic paint stirrer. Durable and easy to clean, suitable for repeated use.

Drill-mounted paddle mixer. Recommended for:

Mechanical mixing provides a far more consistent result than hand stirring for specialist coatings.

Which types of paint need the most mixing?

While every paint should be stirred before use, some products require particular attention.

These products contain high levels of solids that naturally settle during storage.

Common paint stirring mistakes

Only stirring the top. The settled material at the bottom is the part that needs mixing back into the paint.

Shaking the tin. Shaking rarely mixes heavy pigments properly and can introduce unwanted air bubbles.

Mixing too quickly. Excessive speed can trap air in the coating, leading to bubbles during application.

Using the wrong tool. A screwdriver or similar object won’t adequately mix the paint, particularly around the edges of the tin.

Forgetting to stir during application. Pigments continue to settle while you’re working, especially with high-solid industrial coatings.

Frequently Asked Questions

Should I stir brand new paint?

Yes. Even newly purchased paint should always be stirred before application.

How long should I stir paint?

Continue mixing until the colour and consistency are completely uniform. Larger containers and specialist coatings may require several minutes of mixing.

Can I shake paint instead?

Shaking may help with small containers, but it rarely mixes settled pigments as effectively as thorough stirring.

Do water-based paints need stirring?

Yes. Both water-based and solvent-based paints benefit from proper mixing before use.

Should I stir paint between coats?

If the paint has been standing for more than a few minutes, it’s good practice to stir it again before continuing.

Stirring paint properly:
Why it matters and how to avoid costly mistakes

Taking a few minutes to stir your paint properly can significantly improve the final finish and help ensure the coating performs exactly as intended.

Whether you’re applying decorative paint at home or using specialist industrial coatings on a commercial project, proper mixing is one of the simplest ways to avoid application problems and achieve professional results.

If you’re unsure how to prepare or mix a particular coating, our technical team is always happy to help – call us on 01462 421333. We can advise on the correct mixing methods, application techniques and product selection to ensure you achieve the best possible finish.

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